I have been shooting H1000 in it but ran out. It shot the 300 gr wildcat bullet really well about 1/3 moa and has done ok with 300gr SMKs around 1/2 MOA without any development, just 92gr H1000 .010" off the lands running around 2770 fps and no pressure signs. I finally have some Berger 300gr elite hunters and have not been able to get any Retumbo so I really am just playing until it shows up. I do have a small vid of me shooting it I will post up. It is a joy to shoot. Low recoil that comes straight back.